Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Time spent (%) in various heart rate zones during low-volume small-sided games (SSG, black bars) and interval running training (IR, grey bars). Data are presented as means ± SD. ∗ denotes significant difference between SSG and IR at p < 0.05.
